Floating-beam pump



M. C. WILKINSON FLOATING BEAM PUMP Filed Nov. '7,

Aug. 18, 1 925.

firyen for in dotted lines in Rig. 3) located on the Patented Aug. 18, 1925.

UNITED ES PATENT oF FICE- MELVILILE C. WILKINSON, OF LOS ANGELES, CALIFORNIA.

FLOATING-B rnmr.

Application filed November 7, 153211 Serial No. 513,422.

. To all whom it may concern:

- circular motion into linear Be it known that l, MnLvILLn G. WILKIN- SON, a citizen of the United States, residing at Los Angeles, in the county of Los Angeles and State of California, have invented a new and useful Floating-Beam Pump, of which the following, is a specification.

My invention relates to improvements in' 4 deep well pumps, in which circular motion is changed into linear motion, and the .objects of my improvement are, first, to elimihate the ordinary forms of crossheads, second, to eliminate the large areas of sliding contact and attendant lubrication now necessary with that mechanism, third, to resolve motion without the use 'of guides.

I attain these objects by the mechanism illustrated in the accompanying drawings in which' Fig. 1 is a side elevation of the"mecha-' nism Fig. 2 is a front view of the same;

Fig. 3 is a top view of the same and Fig. 4 is a rear view of the same.

Similar numerals refer to the same parts throughout the several views.

The base 1 is of rectangular form having a groove recessed down the center of the topto provide clearance space for the swing a of the crank and other parts; at the front a slotted bracket or shelf 2 extends outward- 1 from its lower edge'to which is attached t e T of the well plpe' (the top flange ofwhich is indicated in dotted lines in Figs. 1

and 2). The bracket is supported by the webs 3; at the to of the base, near the front edge thereo ,are located the main shaft bearings 4; on top of the base and in rear of these main bearings are attached the front legs of' two brackets 5, the rear legs of these brackets being attached to the top of the base in rear of the counter shaft bearings 6. On top of the base and at the two rear corners thereof are the lugs. a

Carried in the main bearin 4 is the main shaft 8, said shaft has a cra located in the center thereof. and a spur gear 9 (shown in dotted lines in Figs, 2, 3 and 4) on one end;

into the gear 9 is meshed a' pinion 10 (shown countershaft 11 which 1s carried in the bearings. 6, the end of the countershaft 11 opposite the pinion extends be and the side of thebase to receive power or operating the 1' pumpfrom a straight line.

A pitman 12, with hearing boxes at each end thereof, at one end is attached to and embraces the crank pin of the main shaft crank, and the other end (is attached to andembraces the wrist pin 13 in the floating beam 14:-

A rocker arm 15 is attached hingewise. to o the lugs 7 by a shaft 16 passing through the lugs 7 and the lugs on the lower end of the rocker arm; the u per end of the rocker arm is attached hingewise to the floating beam 14 by a shaft 17 passing through lugs on the rocker arm and a hole through the floating beam, thus forming a swinging fulcrum for the floating beam.

Through the front end of the floating beam a hole is drilled through which passes the brackets 5 and passing-through the bearings in the other end of the links.

The center lines of the pins and shaft 18, 21, 20 and 17 are all in the same plane and parallel to eachother when the floating beam is at the center of its stroke, also the direction of the center lines of these pins and of pin 13 are perpendicular to a plane passing through the center lines of the floating beam and pump plunger rod.

The followin approximate'distances between pivots o the various members have been found to give satisfactor results.

Distance between pivots 1 and 18 v of floating beam, three times length of pump stroke. v

Distance between pivots 17 and 20"of floating beam, length of puinp stroke.

Distance between pivots 20 and 21 of links 22, one-half length of ump stroke.

Distance between ivots 1 -and 21 when floating beam is at e center'of the stroke, one and one-half times length of stroke.

Length between rocker arm immaterial provided the areal pivotsv 16 and 17, of

swing of pivot 17 does not vary materially for that member.

The movement of the pump members is as follows,-

When the main shaft and crank are turned to a position where the crank pin occupies the position of the dotted circle 23 Fig. 1 the floating beam 14 will have been carried to its upper position as shown in dotted lines, the links 22 will have caused the pin 20 to move to the position of the dotted circle 24 and the floating beam 14 to a position in which the shaft 17 will be in the position of the dotted circle 25. The rocker arm 15 will have swung on the shaft 16 to the position shown in dotted lines When the main shaft and crank are further rotated so that the crank pin occupies the position shown by the dash and dot circle 26 the floating beam ldwill have passed through its former position shown in solid lines and assume its, lower position as shown by the dash and dot lines, the pin 17 owill again have moved to the osition as shown by the dotted circle 25 and the rocker arm 15 will again assume the position shown in dotted lines for that member.

During all these movements ofethe floatbeam the center point of the pin 18 have traveled in a practically straight which straight line coincides with the line of the pump plunger rod 19; a

ing will line, center floating beam and In a pumpmechanism, a pump base having oppositely disposed side walls spaced apart, a bearing disposed on the upper edge of each of said side walls and being oppositely disposed, a movable rocker arm cured to the upper edge of the side walls oi said base and at one end thereof, the upper end of said rocker arm being pivotally secured to one end of a floating beam, a floating beam, links pivotally secured to the to the upper end of the, bearings, a crank shaft a pitman, one end of said pitman being pivotall-y secured to the floating beam intermediate the width of said beam, the other end of said pitman being pivotally connected to said crank shaft, the free ends of said crank shaft being pivotally secured to bearings formed on the upper edge of the side walls of said base, and a pump lun r rod pivotally secured to the end 0 said fioating beam.

MELVILLE C. WILKINSON. 

